title: 4-Di-phenyl-phosphanyl-8-methyl-1,5-naphthyridine.
abstract: In the title compound, C21H17N2P, the dihedral angles between the 1,5-naphthyridine ring system (r.m.s. deviation = 0.005 Å) and the phenyl rings are 89.18 (8) and 77.39 (8)°. The phenyl rings are almost perpendicular, making a dihedral angle of 88.12 (8)°. The only possible inter-molecular inter-action is a very weak aromatic π-π stacking inter-action [centroid-centroid separation = 3.898 (2) Å].
authors.affiliation: Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Kun-Yan
authors.initials: KY
authors.lastname: Wang
authors.forename: Jin-Fang
authors.initials: JF
authors.lastname: Liu
authors.forename: Dan-Feng
authors.initials: DF
authors.lastname: Wang
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Zhu